package com.crm.service.system.interceptor;

import com.alibaba.fastjson.JSON;
import com.crm.model.system.pojo.User;
import com.crm.service.system.properties.JwtProperties;
import com.crm.utils.JwtUtil;
import com.crm.utils.ThreadLocalUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;

@Slf4j
@Component
public class LoginCheckInterceptor implements HandlerInterceptor {
    @Autowired
    private JwtProperties jwtProperties;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = null;
        Enumeration<String> tokens = request.getHeaders(jwtProperties.getTokenName());
        ArrayList<String> list = Collections.list(tokens); // 将Enumeration转换为ArrayList // 现在你可以使用ArrayList进行操作 for (String header : list) { System.out.println(header); }
        for (String s : list) {
            token = s;
        }

        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getSecretKey(), token);

            //User user = (User) claims.get("userId");
            //System.out.println(user.toString());
            String json = JSON.toJSONString(claims.get("userId"));
            User user = JSON.parseObject(json, User.class);


            log.info("当前用户ID为：{}", user.getId());
            ThreadLocalUtil.setUser(user);


            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            System.out.println(ex);
            return false;
        }
    }

}
